Malicious PDF — malware analysis report

Static analysis result for SHA-256 132aac1704d8a362…

MALICIOUS

PDF

98.4 KB Created: 2021-07-07 21:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 03a7d69df55d3e9ebc08184524d92d56 SHA-1: 9bca2fd69c9f43d06c9f0fe45895a8ffd80d8a92 SHA-256: 132aac1704d8a36277d4f78579e1de3ea21df99984726d61eea921131304d9f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to exploiting PDF vulnerabilities or directing users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://allytemp.ru/uplcv?utm_term=application+of+discriminant+analysis PDF link annotation
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/e7iemtfi1hbg308saln8rjl5sd/pajimopuzewik.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e20baa3e11c---refoxolume.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608980ad5c361---60140136904.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aba682d0b---fezikejobibamogal.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/2491288769.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/55165134609.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/90602f6fcf5a1b6f81353cd782995d76/58348970607.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210510020557.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/kilexugazex.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87749f861---zodukekexane.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb77a3e783---65920599926.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/83571208860.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca034c9959d---kuzekowawadikibe.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/30495892242.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/65059459638.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097da3f868dd---nogixalutaferekiwoparunu.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/d9e7171900a242c180d0e6048f16e1c1/wurabemaf.pdfIn PDF document text
    • http://sunnysolutions.it/uploads/assets/file/56868686174.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a448b7cd953---gozusodaxalidewagarixeviw.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/fiwisikajalaganotibuvodo.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/19864509824.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/4a87ec3e60e7aac1766579f74be30c22/34801242882.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/84862292828.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 10744 bytes
SHA-256: 6f528f421612605b66a8672b0005e60b520e7a45e5608c395dfb651ea07bf152
font_02_sfnt_off00014d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5F 17724 bytes
SHA-256: 156f4ac504fd90bb7a53eda81dffb23a36c2d792e82c3393c94d470ea6364079

Open this report in the interactive analyzer, or submit your own file for analysis.